{"id":"CVE-2026-44266","published":"2026-11-03T18:18:02.957","lastModified":"2026-11-03T20:18:13.823","description":"Elo is a purely functional expression language for no-code tools. Prior to 1.0.1, the Ruby backend in src/compilers/ruby.ts embeds attacker-controlled text in Ruby double-quoted strings without escaping #, so Ruby interpolation forms in the string-literal emitter or the labelled subtype-constraint branch become executable Ruby. The affected entry points include the /try playground with the Ruby target, bin/eloc -t ruby -x, and defaultFormats.elo.parse() followed by Ruby emission. A failing labelled subtype constraint evaluates its message, while an ordinary string literal is evaluated when the compiled Ruby runs, allowing Ruby code and shell command execution through backticks. JavaScript, Python, and SQL emission are not affected by this Ruby-specific path. This issue is fixed in version 1.0.1.","cvssScore":9.8,"cvssSeverity":"CRITICAL","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","cwes":["CWE-94","CWE-116","CWE-1336"],"vendors":[],"products":[],"references":[{"url":"https://github.com/enspirit/elo/commit/51b869963fbe445c18328714a7ccfbd76b21ba38","tags":[]},{"url":"https://github.com/enspirit/elo/commit/d2a89a8db76a244eb740687524a7e8529b7554b5","tags":[]},{"url":"https://github.com/enspirit/elo/security/advisories/GHSA-7w38-ggh5-v542","tags":[]},{"url":"https://github.com/enspirit/elo/security/advisories/GHSA-7w38-ggh5-v542","tags":[]}],"exploitRefs":[{"url":"https://github.com/enspirit/elo/commit/51b869963fbe445c18328714a7ccfbd76b21ba38","tags":[]},{"url":"https://github.com/enspirit/elo/commit/d2a89a8db76a244eb740687524a7e8529b7554b5","tags":[]},{"url":"https://github.com/enspirit/elo/security/advisories/GHSA-7w38-ggh5-v542","tags":[]},{"url":"https://github.com/enspirit/elo/security/advisories/GHSA-7w38-ggh5-v542","tags":[]}],"hasPoc":true,"ai":{"summary":"The Ruby backend in Elo prior to 1.0.1 embeds unescaped attacker-controlled input into double-quoted Ruby strings, enabling code injection via string interpolation (#) or backtick command execution when compiled Ruby runs.","exploitability":"Exploitation requires sending malicious input to the Ruby-targeted /try playground, bin/eloc -t ruby -x, or parse+emit pipeline; no authentication or user interaction is needed (CVSS AV:N/AC:L/PR:N/UI:N).","blast_radius":"Successful exploitation grants full remote code execution with the privileges of the Ruby interpreter, compromising confidentiality, integrity, and availability of the host system.","remediation":"Upgrade to Elo version 1.0.1 or later, which fixes the unescaped # handling in Ruby string-literal emission.","detection":"No reliable host or network indicator is derivable from the published description.","tags":["rce","code-injection","ruby","no-code","web"],"model":"garnet-coder","analyzedAt":"2026-11-04T09:47:57.914Z"}}